openbox/screen.c

   1 /* -*- indent-tabs-mode: nil; tab-width: 4; c-basic-offset: 4; -*-
   2
   3    screen.c for the Openbox window manager
   4    Copyright (c) 2003        Ben Jansens
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    See the COPYING file for a copy of the GNU General Public License.
  17 */
  18
  19 #include "debug.h"
  20 #include "openbox.h"
  21 #include "dock.h"
  22 #include "xerror.h"
  23 #include "prop.h"
  24 #include "grab.h"
  25 #include "startupnotify.h"
  26 #include "moveresize.h"
  27 #include "config.h"
  28 #include "screen.h"
  29 #include "client.h"
  30 #include "frame.h"
  31 #include "event.h"
  32 #include "focus.h"
  33 #include "popup.h"
  34 #include "extensions.h"
  35 #include "render/render.h"
  36
  37 #include <X11/Xlib.h>
  38 #ifdef HAVE_UNISTD_H
  39 #  include <sys/types.h>
  40 #  include <unistd.h>
  41 #endif
  42 #include <assert.h>
  43
  44 /*! The event mask to grab on the root window */
  45 #define ROOT_EVENTMASK (StructureNotifyMask | PropertyChangeMask | \
  46                         EnterWindowMask | LeaveWindowMask | \
  47                         SubstructureNotifyMask | SubstructureRedirectMask | \
  48                         ButtonPressMask | ButtonReleaseMask | ButtonMotionMask)
  49
  50 guint    screen_num_desktops;
  51 guint    screen_num_monitors;
  52 guint    screen_desktop;
  53 guint    screen_last_desktop;
  54 Size     screen_physical_size;
  55 gboolean screen_showing_desktop;
  56 DesktopLayout screen_desktop_layout;
  57 char   **screen_desktop_names;
  58 Window   screen_support_win;
  59
  60 static Rect  **area; /* array of desktop holding array of xinerama areas */
  61 static Rect  *monitor_area;
  62
  63 static ObPagerPopup *desktop_cycle_popup;
  64
  65 static gboolean replace_wm()
  66 {
  67     char *wm_sn;
  68     Atom wm_sn_atom;
  69     Window current_wm_sn_owner;
  70     Time timestamp;
  71
  72     wm_sn = g_strdup_printf("WM_S%d", ob_screen);
  73     wm_sn_atom = XInternAtom(ob_display, wm_sn, FALSE);
  74     g_free(wm_sn);
  75
  76     current_wm_sn_owner = XGetSelectionOwner(ob_display, wm_sn_atom);
  77     if (current_wm_sn_owner) {
  78         if (!ob_replace_wm) {
  79             g_warning("A window manager is already running on screen %d",
  80                       ob_screen);
  81             return FALSE;
  82         }
  83         xerror_set_ignore(TRUE);
  84         xerror_occured = FALSE;
  85
  86         /* We want to find out when the current selection owner dies */
  87         XSelectInput(ob_display, current_wm_sn_owner, StructureNotifyMask);
  88         XSync(ob_display, FALSE);
  89
  90         xerror_set_ignore(FALSE);
  91         if (xerror_occured)
  92             current_wm_sn_owner = None;
  93     }
  94
  95     {
  96         /* Generate a timestamp */
  97         XEvent event;
  98
  99         XSelectInput(ob_display, screen_support_win, PropertyChangeMask);
 100
 101         XChangeProperty(ob_display, screen_support_win,
 102                         prop_atoms.wm_class, prop_atoms.string,
 103                         8, PropModeAppend, NULL, 0);
 104         XWindowEvent(ob_display, screen_support_win,
 105                      PropertyChangeMask, &event);
 106
 107         XSelectInput(ob_display, screen_support_win, NoEventMask);
 108
 109         timestamp = event.xproperty.time;
 110     }
 111
 112     XSetSelectionOwner(ob_display, wm_sn_atom, screen_support_win,
 113                        timestamp);
 114
 115     if (XGetSelectionOwner(ob_display, wm_sn_atom) != screen_support_win) {
 116         g_warning("Could not acquire window manager selection on screen %d",
 117                   ob_screen);
 118         return FALSE;
 119     }
 120
 121     /* Wait for old window manager to go away */
 122     if (current_wm_sn_owner) {
 123       XEvent event;
 124       gulong wait = 0;
 125       const gulong timeout = G_USEC_PER_SEC * 15; /* wait for 15s max */
 126
 127       while (wait < timeout) {
 128           if (XCheckWindowEvent(ob_display, current_wm_sn_owner,
 129                                 StructureNotifyMask, &event) &&
 130               event.type == DestroyNotify)
 131               break;
 132           g_usleep(G_USEC_PER_SEC / 10);
 133           wait += G_USEC_PER_SEC / 10;
 134       }
 135
 136       if (wait >= timeout) {
 137           g_warning("Timeout expired while waiting for the current WM to die "
 138                     "on screen %d", ob_screen);
 139           return FALSE;
 140       }
 141     }
 142
 143     /* Send client message indicating that we are now the WM */
 144     prop_message(RootWindow(ob_display, ob_screen), prop_atoms.manager,
 145                  timestamp, wm_sn_atom, 0, 0, SubstructureNotifyMask);
 146
 147
 148     return TRUE;
 149 }
 150
 151 gboolean screen_annex()
 152 {
 153     XSetWindowAttributes attrib;
 154     pid_t pid;
 155     gint i, num_support;
 156     guint32 *supported;
 157
 158     /* create the netwm support window */
 159     attrib.override_redirect = TRUE;
 160     screen_support_win = XCreateWindow(ob_display,
 161                                        RootWindow(ob_display, ob_screen),
 162                                        -100, -100, 1, 1, 0,
 163                                        CopyFromParent, InputOutput,
 164                                        CopyFromParent,
 165                                        CWOverrideRedirect, &attrib);
 166     XMapRaised(ob_display, screen_support_win);
 167
 168     if (!replace_wm()) {
 169         XDestroyWindow(ob_display, screen_support_win);
 170         return FALSE;
 171     }
 172
 173     xerror_set_ignore(TRUE);
 174     xerror_occured = FALSE;
 175     XSelectInput(ob_display, RootWindow(ob_display, ob_screen),
 176                  ROOT_EVENTMASK);
 177     xerror_set_ignore(FALSE);
 178     if (xerror_occured) {
 179         g_warning("A window manager is already running on screen %d",
 180                   ob_screen);
 181
 182         XDestroyWindow(ob_display, screen_support_win);
 183         return FALSE;
 184     }
 185
 186
 187     screen_set_root_cursor();
 188
 189     /* set the OPENBOX_PID hint */
 190     pid = getpid();
 191     PROP_SET32(RootWindow(ob_display, ob_screen),
 192                openbox_pid, cardinal, pid);
 193
 194     /* set supporting window */
 195     PROP_SET32(RootWindow(ob_display, ob_screen),
 196                net_supporting_wm_check, window, screen_support_win);
 197
 198     /* set properties on the supporting window */
 199     PROP_SETS(screen_support_win, net_wm_name, "Openbox");
 200     PROP_SET32(screen_support_win, net_supporting_wm_check,
 201                window, screen_support_win);
 202
 203     /* set the _NET_SUPPORTED_ATOMS hint */
 204     num_support = 51;
 205     i = 0;
 206     supported = g_new(guint32, num_support);
 207     supported[i++] = prop_atoms.net_current_desktop;
 208     supported[i++] = prop_atoms.net_number_of_desktops;
 209     supported[i++] = prop_atoms.net_desktop_geometry;
 210     supported[i++] = prop_atoms.net_desktop_viewport;
 211     supported[i++] = prop_atoms.net_active_window;
 212     supported[i++] = prop_atoms.net_workarea;
 213     supported[i++] = prop_atoms.net_client_list;
 214     supported[i++] = prop_atoms.net_client_list_stacking;
 215     supported[i++] = prop_atoms.net_desktop_names;
 216     supported[i++] = prop_atoms.net_close_window;
 217     supported[i++] = prop_atoms.net_desktop_layout;
 218     supported[i++] = prop_atoms.net_showing_desktop;
 219     supported[i++] = prop_atoms.net_wm_name;
 220     supported[i++] = prop_atoms.net_wm_visible_name;
 221     supported[i++] = prop_atoms.net_wm_icon_name;
 222     supported[i++] = prop_atoms.net_wm_visible_icon_name;
 223     supported[i++] = prop_atoms.net_wm_desktop;
 224     supported[i++] = prop_atoms.net_wm_strut;
 225     supported[i++] = prop_atoms.net_wm_window_type;
 226     supported[i++] = prop_atoms.net_wm_window_type_desktop;
 227     supported[i++] = prop_atoms.net_wm_window_type_dock;
 228     supported[i++] = prop_atoms.net_wm_window_type_toolbar;
 229     supported[i++] = prop_atoms.net_wm_window_type_menu;
 230     supported[i++] = prop_atoms.net_wm_window_type_utility;
 231     supported[i++] = prop_atoms.net_wm_window_type_splash;
 232     supported[i++] = prop_atoms.net_wm_window_type_dialog;
 233     supported[i++] = prop_atoms.net_wm_window_type_normal;
 234     supported[i++] = prop_atoms.net_wm_allowed_actions;
 235     supported[i++] = prop_atoms.net_wm_action_move;
 236     supported[i++] = prop_atoms.net_wm_action_resize;
 237     supported[i++] = prop_atoms.net_wm_action_minimize;
 238     supported[i++] = prop_atoms.net_wm_action_shade;
 239     supported[i++] = prop_atoms.net_wm_action_maximize_horz;
 240     supported[i++] = prop_atoms.net_wm_action_maximize_vert;
 241     supported[i++] = prop_atoms.net_wm_action_fullscreen;
 242     supported[i++] = prop_atoms.net_wm_action_change_desktop;
 243     supported[i++] = prop_atoms.net_wm_action_close;
 244     supported[i++] = prop_atoms.net_wm_state;
 245     supported[i++] = prop_atoms.net_wm_state_modal;
 246     supported[i++] = prop_atoms.net_wm_state_maximized_vert;
 247     supported[i++] = prop_atoms.net_wm_state_maximized_horz;
 248     supported[i++] = prop_atoms.net_wm_state_shaded;
 249     supported[i++] = prop_atoms.net_wm_state_skip_taskbar;
 250     supported[i++] = prop_atoms.net_wm_state_skip_pager;
 251     supported[i++] = prop_atoms.net_wm_state_hidden;
 252     supported[i++] = prop_atoms.net_wm_state_fullscreen;
 253     supported[i++] = prop_atoms.net_wm_state_above;
 254     supported[i++] = prop_atoms.net_wm_state_below;
 255     supported[i++] = prop_atoms.net_moveresize_window;
 256     supported[i++] = prop_atoms.net_wm_moveresize;
 257     supported[i++] = prop_atoms.ob_wm_state_undecorated;
 258     g_assert(i == num_support);
 259 /*
 260   supported[] = prop_atoms.net_wm_action_stick;
 261 */
 262
 263     PROP_SETA32(RootWindow(ob_display, ob_screen),
 264                 net_supported, atom, supported, num_support);
 265     g_free(supported);
 266
 267     return TRUE;
 268 }
 269
 270 void screen_startup(gboolean reconfig)
 271 {
 272     GSList *it;
 273     guint i;
 274
 275     desktop_cycle_popup = pager_popup_new(FALSE);
 276
 277     if (!reconfig)
 278         /* get the initial size */
 279         screen_resize();
 280
 281     /* set the names */
 282     screen_desktop_names = g_new(char*,
 283                                  g_slist_length(config_desktops_names) + 1);
 284     for (i = 0, it = config_desktops_names; it; ++i, it = it->next)
 285         screen_desktop_names[i] = it->data; /* dont strdup */
 286     screen_desktop_names[i] = NULL;
 287     PROP_SETSS(RootWindow(ob_display, ob_screen),
 288                net_desktop_names, screen_desktop_names);
 289     g_free(screen_desktop_names); /* dont free the individual strings */
 290     screen_desktop_names = NULL;
 291
 292     if (!reconfig)
 293         screen_num_desktops = 0;
 294     screen_set_num_desktops(config_desktops_num);
 295     if (!reconfig) {
 296         screen_set_desktop(0);
 297
 298         /* don't start in showing-desktop mode */
 299         screen_showing_desktop = FALSE;
 300         PROP_SET32(RootWindow(ob_display, ob_screen),
 301                    net_showing_desktop, cardinal, screen_showing_desktop);
 302
 303         screen_update_layout();
 304     }
 305 }
 306
 307 void screen_shutdown(gboolean reconfig)
 308 {
 309     Rect **r;
 310
 311     pager_popup_free(desktop_cycle_popup);
 312
 313     if (!reconfig) {
 314         XSelectInput(ob_display, RootWindow(ob_display, ob_screen),
 315                      NoEventMask);
 316
 317         /* we're not running here no more! */
 318         PROP_ERASE(RootWindow(ob_display, ob_screen), openbox_pid);
 319         /* not without us */
 320         PROP_ERASE(RootWindow(ob_display, ob_screen), net_supported);
 321         /* don't keep this mode */
 322         PROP_ERASE(RootWindow(ob_display, ob_screen), net_showing_desktop);
 323
 324         XDestroyWindow(ob_display, screen_support_win);
 325     }
 326
 327     g_strfreev(screen_desktop_names);
 328     screen_desktop_names = NULL;
 329     for (r = area; *r; ++r)
 330         g_free(*r);
 331     g_free(area);
 332     area = NULL;
 333 }
 334
 335 void screen_resize()
 336 {
 337     static int oldw = 0, oldh = 0;
 338     int w, h;
 339     GList *it;
 340     guint32 geometry[2];
 341
 342     w = WidthOfScreen(ScreenOfDisplay(ob_display, ob_screen));
 343     h = HeightOfScreen(ScreenOfDisplay(ob_display, ob_screen));
 344
 345     if (w == oldw && h == oldh) return;
 346
 347     oldw = w; oldh = h;
 348
 349     /* Set the _NET_DESKTOP_GEOMETRY hint */
 350     screen_physical_size.width = geometry[0] = w;
 351     screen_physical_size.height = geometry[1] = h;
 352     PROP_SETA32(RootWindow(ob_display, ob_screen),
 353                 net_desktop_geometry, cardinal, geometry, 2);
 354
 355     if (ob_state() == OB_STATE_STARTING)
 356         return;
 357
 358     screen_update_areas();
 359     dock_configure();
 360
 361     for (it = client_list; it; it = it->next)
 362         client_move_onscreen(it->data, FALSE);
 363 }
 364
 365 void screen_set_num_desktops(guint num)
 366 {
 367     guint i, old;
 368     guint32 *viewport;
 369     GList *it;
 370
 371     g_assert(num > 0);
 372
 373     if (screen_num_desktops == num) return;
 374
 375     old = screen_num_desktops;
 376     screen_num_desktops = num;
 377     PROP_SET32(RootWindow(ob_display, ob_screen),
 378                net_number_of_desktops, cardinal, num);
 379
 380     /* set the viewport hint */
 381     viewport = g_new0(guint32, num * 2);
 382     PROP_SETA32(RootWindow(ob_display, ob_screen),
 383                 net_desktop_viewport, cardinal, viewport, num * 2);
 384     g_free(viewport);
 385
 386     /* the number of rows/columns will differ */
 387     screen_update_layout();
 388
 389     /* may be some unnamed desktops that we need to fill in with names */
 390     screen_update_desktop_names();
 391
 392     /* move windows on desktops that will no longer exist! */
 393     for (it = client_list; it != NULL; it = it->next) {
 394         ObClient *c = it->data;
 395         if (c->desktop >= num && c->desktop != DESKTOP_ALL)
 396             client_set_desktop(c, num - 1, FALSE);
 397     }
 398
 399     /* change our struts/area to match (after moving windows) */
 400     screen_update_areas();
 401
 402     /* change our desktop if we're on one that no longer exists! */
 403     if (screen_desktop >= screen_num_desktops)
 404         screen_set_desktop(num - 1);
 405
 406    /* update the focus lists */
 407     /* free our lists for the desktops which have disappeared */
 408     for (i = num; i < old; ++i)
 409         g_list_free(focus_order[i]);
 410     /* realloc the array */
 411     focus_order = g_renew(GList*, focus_order, num);
 412     /* set the new lists to be empty */
 413     for (i = old; i < num; ++i)
 414         focus_order[i] = NULL;
 415 }
 416
 417 void screen_set_desktop(guint num)
 418 {
 419     GList *it;
 420     guint old;
 421     ObClient *target;
 422
 423     g_assert(num < screen_num_desktops);
 424
 425     old = screen_desktop;
 426     screen_desktop = num;
 427     PROP_SET32(RootWindow(ob_display, ob_screen),
 428                net_current_desktop, cardinal, num);
 429
 430     if (old == num) return;
 431
 432     screen_last_desktop = old;
 433
 434     ob_debug("Moving to desktop %d\n", num+1);
 435
 436     if (moveresize_client)
 437         client_set_desktop(moveresize_client, num, TRUE);
 438
 439     /* show windows before hiding the rest to lessen the enter/leave events */
 440
 441     /* show windows from top to bottom */
 442     for (it = stacking_list; it; it = g_list_next(it)) {
 443         if (WINDOW_IS_CLIENT(it->data)) {
 444             ObClient *c = it->data;
 445             if (client_should_show(c))
 446                 frame_show(c->frame);
 447         }
 448     }
 449
 450     /* hide windows from bottom to top */
 451     for (it = g_list_last(stacking_list); it; it = g_list_previous(it)) {
 452         if (WINDOW_IS_CLIENT(it->data)) {
 453             ObClient *c = it->data;
 454             if (c->frame->visible && !client_should_show(c))
 455                 frame_hide(c->frame);
 456         }
 457     }
 458
 459     event_ignore_queued_enters();
 460
 461     target = focus_fallback_target(OB_FOCUS_FALLBACK_NOFOCUS);
 462     if (target) {
 463         frame_adjust_focus(target->frame, TRUE);
 464
 465         /*!
 466           When this focus_client check is not used, you can end up with races,
 467           as demonstrated with gnome-panel, sometmies the window you click on
 468           another desktop ends up losing focus cuz of the focus change here.
 469         */
 470         if (!focus_client)
 471             client_focus(target);
 472     }
 473 }
 474
 475 static void get_row_col(guint d, guint *r, guint *c)
 476 {
 477     switch (screen_desktop_layout.orientation) {
 478     case OB_ORIENTATION_HORZ:
 479         switch (screen_desktop_layout.start_corner) {
 480         case OB_CORNER_TOPLEFT:
 481             *r = d / screen_desktop_layout.columns;
 482             *c = d % screen_desktop_layout.columns;
 483             break;
 484         case OB_CORNER_BOTTOMLEFT:
 485             *r = screen_desktop_layout.rows - 1 -
 486                 d / screen_desktop_layout.columns;
 487             *c = d % screen_desktop_layout.columns;
 488             break;
 489         case OB_CORNER_TOPRIGHT:
 490             *r = d / screen_desktop_layout.columns;
 491             *c = screen_desktop_layout.columns - 1 -
 492                 d % screen_desktop_layout.columns;
 493             break;
 494         case OB_CORNER_BOTTOMRIGHT:
 495             *r = screen_desktop_layout.rows - 1 -
 496                 d / screen_desktop_layout.columns;
 497             *c = screen_desktop_layout.columns - 1 -
 498                 d % screen_desktop_layout.columns;
 499             break;
 500         }
 501         break;
 502     case OB_ORIENTATION_VERT:
 503         switch (screen_desktop_layout.start_corner) {
 504         case OB_CORNER_TOPLEFT:
 505             *r = d % screen_desktop_layout.rows;
 506             *c = d / screen_desktop_layout.rows;
 507             break;
 508         case OB_CORNER_BOTTOMLEFT:
 509             *r = screen_desktop_layout.rows - 1 -
 510                 d % screen_desktop_layout.rows;
 511             *c = d / screen_desktop_layout.rows;
 512             break;
 513         case OB_CORNER_TOPRIGHT:
 514             *r = d % screen_desktop_layout.rows;
 515             *c = screen_desktop_layout.columns - 1 -
 516                 d / screen_desktop_layout.rows;
 517             break;
 518         case OB_CORNER_BOTTOMRIGHT:
 519             *r = screen_desktop_layout.rows - 1 -
 520                 d % screen_desktop_layout.rows;
 521             *c = screen_desktop_layout.columns - 1 -
 522                 d / screen_desktop_layout.rows;
 523             break;
 524         }
 525         break;
 526     }
 527 }
 528
 529 static guint translate_row_col(guint r, guint c)
 530 {
 531     switch (screen_desktop_layout.orientation) {
 532     case OB_ORIENTATION_HORZ:
 533         switch (screen_desktop_layout.start_corner) {
 534         case OB_CORNER_TOPLEFT:
 535             return r % screen_desktop_layout.rows *
 536                 screen_desktop_layout.columns +
 537                 c % screen_desktop_layout.columns;
 538         case OB_CORNER_BOTTOMLEFT:
 539             return (screen_desktop_layout.rows - 1 -
 540                     r % screen_desktop_layout.rows) *
 541                 screen_desktop_layout.columns +
 542                 c % screen_desktop_layout.columns;
 543         case OB_CORNER_TOPRIGHT:
 544             return r % screen_desktop_layout.rows *
 545                 screen_desktop_layout.columns +
 546                 (screen_desktop_layout.columns - 1 -
 547                  c % screen_desktop_layout.columns);
 548         case OB_CORNER_BOTTOMRIGHT:
 549             return (screen_desktop_layout.rows - 1 -
 550                     r % screen_desktop_layout.rows) *
 551                 screen_desktop_layout.columns +
 552                 (screen_desktop_layout.columns - 1 -
 553                  c % screen_desktop_layout.columns);
 554         }
 555     case OB_ORIENTATION_VERT:
 556         switch (screen_desktop_layout.start_corner) {
 557         case OB_CORNER_TOPLEFT:
 558             return c % screen_desktop_layout.columns *
 559                 screen_desktop_layout.rows +
 560                 r % screen_desktop_layout.rows;
 561         case OB_CORNER_BOTTOMLEFT:
 562             return c % screen_desktop_layout.columns *
 563                 screen_desktop_layout.rows +
 564                 (screen_desktop_layout.rows - 1 -
 565                  r % screen_desktop_layout.rows);
 566         case OB_CORNER_TOPRIGHT:
 567             return (screen_desktop_layout.columns - 1 -
 568                     c % screen_desktop_layout.columns) *
 569                 screen_desktop_layout.rows +
 570                 r % screen_desktop_layout.rows;
 571         case OB_CORNER_BOTTOMRIGHT:
 572             return (screen_desktop_layout.columns - 1 -
 573                     c % screen_desktop_layout.columns) *
 574                 screen_desktop_layout.rows +
 575                 (screen_desktop_layout.rows - 1 -
 576                  r % screen_desktop_layout.rows);
 577         }
 578     }
 579     g_assert_not_reached();
 580     return 0;
 581 }
 582
 583 void screen_desktop_popup(guint d, gboolean show)
 584 {
 585     Rect *a;
 586
 587     if (!show) {
 588         pager_popup_hide(desktop_cycle_popup);
 589     } else {
 590         a = screen_physical_area_monitor(0);
 591         pager_popup_position(desktop_cycle_popup, CenterGravity,
 592                              a->x + a->width / 2, a->y + a->height / 2);
 593         /* XXX the size and the font extents need to be related on some level
 594          */
 595         pager_popup_size(desktop_cycle_popup, POPUP_WIDTH, POPUP_HEIGHT);
 596
 597         pager_popup_set_text_align(desktop_cycle_popup, RR_JUSTIFY_CENTER);
 598
 599         pager_popup_show(desktop_cycle_popup, screen_desktop_names[d], d);
 600     }
 601 }
 602
 603 guint screen_cycle_desktop(ObDirection dir, gboolean wrap, gboolean linear,
 604                            gboolean dialog, gboolean done, gboolean cancel)
 605 {
 606     static gboolean first = TRUE;
 607     static gboolean lin;
 608     static guint origd, d;
 609     guint r, c;
 610
 611     if (cancel) {
 612         d = origd;
 613         goto done_cycle;
 614     } else if (done && dialog) {
 615         goto done_cycle;
 616     }
 617     if (first) {
 618         first = FALSE;
 619         lin = linear;
 620         d = origd = screen_desktop;
 621     }
 622
 623     get_row_col(d, &r, &c);
 624
 625     if (lin) {
 626         switch (dir) {
 627         case OB_DIRECTION_EAST:
 628             if (d < screen_num_desktops - 1)
 629                 ++d;
 630             else if (wrap)
 631                 d = 0;
 632             break;
 633         case OB_DIRECTION_WEST:
 634             if (d > 0)
 635                 --d;
 636             else if (wrap)
 637                 d = screen_num_desktops - 1;
 638             break;
 639         default:
 640             assert(0);
 641             return screen_desktop;
 642         }
 643     } else {
 644         switch (dir) {
 645         case OB_DIRECTION_EAST:
 646             ++c;
 647             if (c >= screen_desktop_layout.columns) {
 648                 if (!wrap) return d = screen_desktop;
 649                 c = 0;
 650             }
 651             d = translate_row_col(r, c);
 652             if (d >= screen_num_desktops) {
 653                 if (!wrap) return d = screen_desktop;
 654                 ++c;
 655             }
 656             break;
 657         case OB_DIRECTION_WEST:
 658             --c;
 659             if (c >= screen_desktop_layout.columns) {
 660                 if (!wrap) return d = screen_desktop;
 661                 c = screen_desktop_layout.columns - 1;
 662             }
 663             d = translate_row_col(r, c);
 664             if (d >= screen_num_desktops) {
 665                 if (!wrap) return d = screen_desktop;
 666                 --c;
 667             }
 668             break;
 669         case OB_DIRECTION_SOUTH:
 670             ++r;
 671             if (r >= screen_desktop_layout.rows) {
 672                 if (!wrap) return d = screen_desktop;
 673                 r = 0;
 674             }
 675             d = translate_row_col(r, c);
 676             if (d >= screen_num_desktops) {
 677                 if (!wrap) return d = screen_desktop;
 678                 ++r;
 679             }
 680             break;
 681         case OB_DIRECTION_NORTH:
 682             --r;
 683             if (r >= screen_desktop_layout.rows) {
 684                 if (!wrap) return d = screen_desktop;
 685                 r = screen_desktop_layout.rows - 1;
 686             }
 687             d = translate_row_col(r, c);
 688             if (d >= screen_num_desktops) {
 689                 if (!wrap) return d = screen_desktop;
 690                 --r;
 691             }
 692             break;
 693         default:
 694             assert(0);
 695             return d = screen_desktop;
 696         }
 697
 698         d = translate_row_col(r, c);
 699     }
 700
 701     if (dialog) {
 702         screen_desktop_popup(d, TRUE);
 703         return d;
 704     }
 705
 706 done_cycle:
 707     first = TRUE;
 708
 709     screen_desktop_popup(0, FALSE);
 710
 711     return d;
 712 }
 713
 714 void screen_update_layout()
 715 {
 716     ObOrientation orient;
 717     ObCorner corner;
 718     guint rows;
 719     guint cols;
 720     guint32 *data;
 721     guint num;
 722     gboolean valid = FALSE;
 723
 724     if (PROP_GETA32(RootWindow(ob_display, ob_screen),
 725                     net_desktop_layout, cardinal, &data, &num)) {
 726         if (num == 3 || num == 4) {
 727
 728             if (data[0] == prop_atoms.net_wm_orientation_vert)
 729                 orient = OB_ORIENTATION_VERT;
 730             else if (data[0] == prop_atoms.net_wm_orientation_horz)
 731                 orient = OB_ORIENTATION_HORZ;
 732             else
 733                 goto screen_update_layout_bail;
 734
 735             if (num < 4)
 736                 corner = OB_CORNER_TOPLEFT;
 737             else {
 738                 if (data[3] == prop_atoms.net_wm_topleft)
 739                     corner = OB_CORNER_TOPLEFT;
 740                 else if (data[3] == prop_atoms.net_wm_topright)
 741                     corner = OB_CORNER_TOPRIGHT;
 742                 else if (data[3] == prop_atoms.net_wm_bottomright)
 743                     corner = OB_CORNER_BOTTOMRIGHT;
 744                 else if (data[3] == prop_atoms.net_wm_bottomleft)
 745                     corner = OB_CORNER_BOTTOMLEFT;
 746                 else
 747                     goto screen_update_layout_bail;
 748             }
 749
 750             cols = data[1];
 751             rows = data[2];
 752
 753             /* fill in a zero rows/columns */
 754             if ((cols == 0 && rows == 0)) { /* both 0's is bad data.. */
 755                 goto screen_update_layout_bail;
 756             } else {
 757                 if (cols == 0) {
 758                     cols = screen_num_desktops / rows;
 759                     if (rows * cols < screen_num_desktops)
 760                         cols++;
 761                     if (rows * cols >= screen_num_desktops + cols)
 762                         rows--;
 763                 } else if (rows == 0) {
 764                     rows = screen_num_desktops / cols;
 765                     if (cols * rows < screen_num_desktops)
 766                         rows++;
 767                     if (cols * rows >= screen_num_desktops + rows)
 768                         cols--;
 769                 }
 770             }
 771
 772             /* bounds checking */
 773             if (orient == OB_ORIENTATION_HORZ) {
 774                 cols = MIN(screen_num_desktops, cols);
 775                 rows = MIN(rows, (screen_num_desktops + cols - 1) / cols);
 776                 cols = screen_num_desktops / rows +
 777                     !!(screen_num_desktops % rows);
 778             } else {
 779                 rows = MIN(screen_num_desktops, rows);
 780                 cols = MIN(cols, (screen_num_desktops + rows - 1) / rows);
 781                 rows = screen_num_desktops / cols +
 782                     !!(screen_num_desktops % cols);
 783             }
 784
 785             valid = TRUE;
 786         }
 787     screen_update_layout_bail:
 788         g_free(data);
 789     }
 790
 791     if (!valid) {
 792         /* defaults */
 793         orient = OB_ORIENTATION_HORZ;
 794         corner = OB_CORNER_TOPLEFT;
 795         rows = 1;
 796         cols = screen_num_desktops;
 797     }
 798
 799     screen_desktop_layout.orientation = orient;
 800     screen_desktop_layout.start_corner = corner;
 801     screen_desktop_layout.rows = rows;
 802     screen_desktop_layout.columns = cols;
 803 }
 804
 805 void screen_update_desktop_names()
 806 {
 807     guint i;
 808
 809     /* empty the array */
 810     g_strfreev(screen_desktop_names);
 811     screen_desktop_names = NULL;
 812
 813     if (PROP_GETSS(RootWindow(ob_display, ob_screen),
 814                    net_desktop_names, utf8, &screen_desktop_names))
 815         for (i = 0; screen_desktop_names[i] && i <= screen_num_desktops; ++i);
 816     else
 817         i = 0;
 818     if (i <= screen_num_desktops) {
 819         screen_desktop_names = g_renew(char*, screen_desktop_names,
 820                                        screen_num_desktops + 1);
 821         screen_desktop_names[screen_num_desktops] = NULL;
 822         for (; i < screen_num_desktops; ++i)
 823             screen_desktop_names[i] = g_strdup("Unnamed Desktop");
 824     }
 825 }
 826
 827 void screen_show_desktop(gboolean show)
 828 {
 829     GList *it;
 830
 831     if (show == screen_showing_desktop) return; /* no change */
 832
 833     screen_showing_desktop = show;
 834
 835     if (show) {
 836         /* bottom to top */
 837         for (it = g_list_last(stacking_list); it != NULL; it = it->prev) {
 838             if (WINDOW_IS_CLIENT(it->data)) {
 839                 ObClient *client = it->data;
 840                 if (client->frame->visible && !client_should_show(client))
 841                     frame_hide(client->frame);
 842             }
 843         }
 844     } else {
 845         /* top to bottom */
 846         for (it = stacking_list; it != NULL; it = it->next) {
 847             if (WINDOW_IS_CLIENT(it->data)) {
 848                 ObClient *client = it->data;
 849                 if (!client->frame->visible && client_should_show(client))
 850                     frame_show(client->frame);
 851             }
 852         }
 853     }
 854
 855     if (show) {
 856         /* focus desktop */
 857         for (it = focus_order[screen_desktop]; it; it = it->next)
 858             if (((ObClient*)it->data)->type == OB_CLIENT_TYPE_DESKTOP &&
 859                 client_focus(it->data))
 860                 break;
 861     } else {
 862         focus_fallback(OB_FOCUS_FALLBACK_NOFOCUS);
 863     }
 864
 865     show = !!show; /* make it boolean */
 866     PROP_SET32(RootWindow(ob_display, ob_screen),
 867                net_showing_desktop, cardinal, show);
 868 }
 869
 870 void screen_install_colormap(ObClient *client, gboolean install)
 871 {
 872     XWindowAttributes wa;
 873
 874     if (client == NULL) {
 875         if (install)
 876             XInstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
 877         else
 878             XUninstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
 879     } else {
 880         if (XGetWindowAttributes(ob_display, client->window, &wa) &&
 881             wa.colormap != None) {
 882             xerror_set_ignore(TRUE);
 883             if (install)
 884                 XInstallColormap(RrDisplay(ob_rr_inst), wa.colormap);
 885             else
 886                 XUninstallColormap(RrDisplay(ob_rr_inst), wa.colormap);
 887             xerror_set_ignore(FALSE);
 888         }
 889     }
 890 }
 891
 892 static inline void
 893 screen_area_add_strut_left(const StrutPartial *s, const Rect *monitor_area,
 894                            gint edge, Strut *ret)
 895 {
 896     if (s->left &&
 897         ((s->left_end <= s->left_start) ||
 898          (RECT_TOP(*monitor_area) < s->left_end &&
 899           RECT_BOTTOM(*monitor_area) > s->left_start)))
 900         ret->left = MAX(ret->left, edge);
 901 }
 902
 903 static inline void
 904 screen_area_add_strut_top(const StrutPartial *s, const Rect *monitor_area,
 905                           gint edge, Strut *ret)
 906 {
 907     if (s->top &&
 908         ((s->top_end <= s->top_start) ||
 909          (RECT_LEFT(*monitor_area) < s->top_end &&
 910           RECT_RIGHT(*monitor_area) > s->top_start)))
 911         ret->top = MAX(ret->top, edge);
 912 }
 913
 914 static inline void
 915 screen_area_add_strut_right(const StrutPartial *s, const Rect *monitor_area,
 916                             gint edge, Strut *ret)
 917 {
 918     if (s->right &&
 919         ((s->right_end <= s->right_start) ||
 920          (RECT_TOP(*monitor_area) < s->right_end &&
 921           RECT_BOTTOM(*monitor_area) > s->right_start)))
 922         ret->right = MAX(ret->right, edge);
 923 }
 924
 925 static inline void
 926 screen_area_add_strut_bottom(const StrutPartial *s, const Rect *monitor_area,
 927                              gint edge, Strut *ret)
 928 {
 929     if (s->bottom &&
 930         ((s->bottom_end <= s->bottom_start) ||
 931          (RECT_LEFT(*monitor_area) < s->bottom_end &&
 932           RECT_RIGHT(*monitor_area) > s->bottom_start)))
 933         ret->bottom = MAX(ret->bottom, edge);
 934 }
 935
 936 void screen_update_areas()
 937 {
 938     guint i, x;
 939     guint32 *dims;
 940     GList *it;
 941     gint o;
 942
 943     g_free(monitor_area);
 944     extensions_xinerama_screens(&monitor_area, &screen_num_monitors);
 945
 946     if (area) {
 947         for (i = 0; area[i]; ++i)
 948             g_free(area[i]);
 949         g_free(area);
 950     }
 951
 952     area = g_new(Rect*, screen_num_desktops + 2);
 953     for (i = 0; i < screen_num_desktops + 1; ++i)
 954         area[i] = g_new0(Rect, screen_num_monitors + 1);
 955     area[i] = NULL;
 956
 957     dims = g_new(guint32, 4 * screen_num_desktops);
 958
 959     for (i = 0; i < screen_num_desktops + 1; ++i) {
 960         Strut *struts;
 961         gint l, r, t, b;
 962
 963         struts = g_new0(Strut, screen_num_monitors);
 964
 965         /* calc the xinerama areas */
 966         for (x = 0; x < screen_num_monitors; ++x) {
 967             area[i][x] = monitor_area[x];
 968             if (x == 0) {
 969                 l = monitor_area[x].x;
 970                 t = monitor_area[x].y;
 971                 r = monitor_area[x].x + monitor_area[x].width - 1;
 972                 b = monitor_area[x].y + monitor_area[x].height - 1;
 973             } else {
 974                 l = MIN(l, monitor_area[x].x);
 975                 t = MIN(t, monitor_area[x].y);
 976                 r = MAX(r, monitor_area[x].x + monitor_area[x].width - 1);
 977                 b = MAX(b, monitor_area[x].y + monitor_area[x].height - 1);
 978             }
 979         }
 980         RECT_SET(area[i][x], l, t, r - l + 1, b - t + 1);
 981
 982         /* apply the struts */
 983
 984         /* find the left-most xin heads, i do this in 2 loops :| */
 985         o = area[i][0].x;
 986         for (x = 1; x < screen_num_monitors; ++x)
 987             o = MIN(o, area[i][x].x);
 988
 989         for (x = 0; x < screen_num_monitors; ++x) {
 990             for (it = client_list; it; it = it->next) {
 991                 ObClient *c = it->data;
 992                 screen_area_add_strut_left(&c->strut,
 993                                            &monitor_area[x],
 994                                            o + c->strut.left - area[i][x].x,
 995                                            &struts[x]);
 996             }
 997             screen_area_add_strut_left(&dock_strut,
 998                                        &monitor_area[x],
 999                                        o + dock_strut.left - area[i][x].x,
1000                                        &struts[x]);
1001
1002             area[i][x].x += struts[x].left;
1003             area[i][x].width -= struts[x].left;
1004         }
1005
1006         /* find the top-most xin heads, i do this in 2 loops :| */
1007         o = area[i][0].y;
1008         for (x = 1; x < screen_num_monitors; ++x)
1009             o = MIN(o, area[i][x].y);
1010
1011         for (x = 0; x < screen_num_monitors; ++x) {
1012             for (it = client_list; it; it = it->next) {
1013                 ObClient *c = it->data;
1014                 screen_area_add_strut_top(&c->strut,
1015                                            &monitor_area[x],
1016                                            o + c->strut.top - area[i][x].y,
1017                                            &struts[x]);
1018             }
1019             screen_area_add_strut_top(&dock_strut,
1020                                       &monitor_area[x],
1021                                       o + dock_strut.top - area[i][x].y,
1022                                       &struts[x]);
1023
1024             area[i][x].y += struts[x].top;
1025             area[i][x].height -= struts[x].top;
1026         }
1027
1028         /* find the right-most xin heads, i do this in 2 loops :| */
1029         o = area[i][0].x + area[i][0].width - 1;
1030         for (x = 1; x < screen_num_monitors; ++x)
1031             o = MAX(o, area[i][x].x + area[i][x].width - 1);
1032
1033         for (x = 0; x < screen_num_monitors; ++x) {
1034             for (it = client_list; it; it = it->next) {
1035                 ObClient *c = it->data;
1036                 screen_area_add_strut_right(&c->strut,
1037                                            &monitor_area[x],
1038                                            (area[i][x].x +
1039                                             area[i][x].width - 1) -
1040                                             (o - c->strut.right),
1041                                             &struts[x]);
1042             }
1043             screen_area_add_strut_right(&dock_strut,
1044                                         &monitor_area[x],
1045                                         (area[i][x].x +
1046                                          area[i][x].width - 1) -
1047                                         (o - dock_strut.right),
1048                                         &struts[x]);
1049
1050             area[i][x].width -= struts[x].right;
1051         }
1052
1053         /* find the bottom-most xin heads, i do this in 2 loops :| */
1054         o = area[i][0].y + area[i][0].height - 1;
1055         for (x = 1; x < screen_num_monitors; ++x)
1056             o = MAX(o, area[i][x].y + area[i][x].height - 1);
1057
1058         for (x = 0; x < screen_num_monitors; ++x) {
1059             for (it = client_list; it; it = it->next) {
1060                 ObClient *c = it->data;
1061                 screen_area_add_strut_bottom(&c->strut,
1062                                              &monitor_area[x],
1063                                              (area[i][x].y +
1064                                               area[i][x].height - 1) - \
1065                                              (o - c->strut.bottom),
1066                                              &struts[x]);
1067             }
1068             screen_area_add_strut_bottom(&dock_strut,
1069                                          &monitor_area[x],
1070                                          (area[i][x].y +
1071                                           area[i][x].height - 1) - \
1072                                          (o - dock_strut.bottom),
1073                                          &struts[x]);
1074
1075             area[i][x].height -= struts[x].bottom;
1076         }
1077
1078         l = RECT_LEFT(area[i][0]);
1079         t = RECT_TOP(area[i][0]);
1080         r = RECT_RIGHT(area[i][0]);
1081         b = RECT_BOTTOM(area[i][0]);
1082         for (x = 1; x < screen_num_monitors; ++x) {
1083             l = MIN(l, RECT_LEFT(area[i][x]));
1084             t = MIN(l, RECT_TOP(area[i][x]));
1085             r = MAX(r, RECT_RIGHT(area[i][x]));
1086             b = MAX(b, RECT_BOTTOM(area[i][x]));
1087         }
1088         RECT_SET(area[i][screen_num_monitors], l, t,
1089                  r - l + 1, b - t + 1);
1090
1091         /* XXX optimize when this is run? */
1092
1093         /* the area has changed, adjust all the maximized
1094            windows */
1095         for (it = client_list; it; it = it->next) {
1096             ObClient *c = it->data;
1097             if (i < screen_num_desktops) {
1098                 if (c->desktop == i)
1099                     client_reconfigure(c);
1100             } else if (c->desktop == DESKTOP_ALL)
1101                 client_reconfigure(c);
1102         }
1103         if (i < screen_num_desktops) {
1104             /* don't set these for the 'all desktops' area */
1105             dims[(i * 4) + 0] = area[i][screen_num_monitors].x;
1106             dims[(i * 4) + 1] = area[i][screen_num_monitors].y;
1107             dims[(i * 4) + 2] = area[i][screen_num_monitors].width;
1108             dims[(i * 4) + 3] = area[i][screen_num_monitors].height;
1109         }
1110
1111         g_free(struts);
1112     }
1113
1114     PROP_SETA32(RootWindow(ob_display, ob_screen), net_workarea, cardinal,
1115                 dims, 4 * screen_num_desktops);
1116
1117     g_free(dims);
1118 }
1119
1120 Rect *screen_area(guint desktop)
1121 {
1122     return screen_area_monitor(desktop, screen_num_monitors);
1123 }
1124
1125 Rect *screen_area_monitor(guint desktop, guint head)
1126 {
1127     if (head > screen_num_monitors)
1128         return NULL;
1129     if (desktop >= screen_num_desktops) {
1130         if (desktop == DESKTOP_ALL)
1131             return &area[screen_num_desktops][head];
1132         return NULL;
1133     }
1134     return &area[desktop][head];
1135 }
1136
1137 Rect *screen_physical_area()
1138 {
1139     return screen_physical_area_monitor(screen_num_monitors);
1140 }
1141
1142 Rect *screen_physical_area_monitor(guint head)
1143 {
1144     if (head > screen_num_monitors)
1145         return NULL;
1146     return &monitor_area[head];
1147 }
1148
1149 void screen_set_root_cursor()
1150 {
1151     if (sn_app_starting())
1152         XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1153                       ob_cursor(OB_CURSOR_BUSY));
1154     else
1155         XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1156                       ob_cursor(OB_CURSOR_POINTER));
1157 }
1158
1159 gboolean screen_pointer_pos(int *x, int *y)
1160 {
1161     Window w;
1162     int i;
1163     guint u;
1164
1165     return !!XQueryPointer(ob_display, RootWindow(ob_display, ob_screen),
1166                            &w, &w, x, y, &i, &i, &u);
1167 }